The Flowmaster Outlaw Extreme Cat-Back Exhaust System is designed for 2019–2026 GM Silverado and Sierra 1500 trucks with the 5.3L engine (2019 New Body Only). Engineered for extreme off-road performance, this exhaust system eliminates the over-axle tailpipe with a dump-style exit for improved ground clearance and departure angle while delivering a deep, aggressive sound.

Constructed entirely of 409 stainless steel, the system uses 3.0-inch mandrel-bent tubing to maximize exhaust flow and durability. The Outlaw series muffler produces a powerful tone and increased performance, delivering maximum dyno gains of 15 hp and 20 lb-ft at the rear wheels. Installation is straightforward using factory hanger locations, and all necessary hardware is included for a hassle-free at-home setup. Backed by Flowmaster's Lifetime Limited Warranty, this system combines extreme performance with rugged durability.

Features

• Outlaw series muffler delivers deep, aggressive sound and increased performance

• 3.0-inch 16-gauge mandrel-bent 409 stainless steel tubing maximizes exhaust flow

• Dump-style exit improves ground clearance and departure angle for extreme off-road driving

• Maximum dyno gains of 15 hp and 20 lb-ft at the rear wheels

• Uses factory hanger locations for simple installation

• Includes all necessary hardware for at-home installation

• Stainless steel construction for long-lasting durability

• Lifetime Limited Warranty

Specifications

• Brand: Flowmaster

• California Proposition 65: Yes

• CARB Compliant: Yes

• Catalytic Converter Included: No

• Catalytic Converter Quantity: 0

• Category: Exhaust

• Clamping Type: Flat Band

• Clamps Included: Yes

• Emission Code: 5

• Exhaust Series: Outlaw Extreme

• Exhaust Tip Cut: Turndown

• Exhaust Tip Diameter: 3.00 in

• Exhaust Tip Edge: Cut

• Exhaust Tip Quantity: 0 (Sold Separately)

• Exhaust Tip Shape: Round

• Exit Style: Single Out Dump

• Finish: Natural

• Gasket Or Seal Included: No

• Grade Type: Performance

• Hangers Included: Yes

• Inlet Type: Clamp-On

• Main Piping Diameter: 3.00 in

• Mount Type: Uses factory hangers

• Muffler Body Diameter: 4.00 in

• Muffler Body Height: 4.00 in

• Muffler Body Length: 10.50 in

• Muffler Body Material: 409 Stainless Steel

• Muffler Body Shape: Round

• Muffler Body Width: 4.00 in

• Muffler Color: Black

• Muffler Finish: Black High-Temperature Paint

• Muffler Flanged Inlet: No

• Muffler Flanged Outlet: No

• Muffler Included: Yes

• Muffler Inlet Connection: Slip-Fit

• Muffler Inlet Inside Diameter: 3.00 in

• Muffler Inlet Outside Diameter: 3.13 in

• Muffler Inlet Location: Center

• Muffler Outlet Diameter: 3.00 in

• Muffler Outlet Quantity: 1

• Muffler Overall Length: 40.00 in

• Muffler Part Number: Kit Only

• Muffler Quantity: 1

• Muffler Series: Outlaw

• Muffler Type: Reflection

• Pipe Color: Silver

• Pipe Material: 409 Stainless Steel

• Product Type: Exhaust System

• Sound Level: Aggressive

• Tail Pipe Outlet Outside Diameter: 3.00 in

• Tail Pipe Quantity: 1 (Single)

• Tail Pipe Tapered Outlet: No

• Type: Cat-Back

• Valve Included: No

• Valve Type: Not Applicable

Fitment 

Fits 2019–2026 GM Silverado 1500
Fits 2019–2026 GM Sierra 1500
Fits models with 5.3L engine
New Body Only (2019+)
Single Out Dump tailpipe exit
Fits 2WD models
Fits 4WD models

The Flowmaster Outlaw Extreme Cat-Back Exhaust System delivers aggressive off-road sound, improved ground clearance, and durable 409 stainless steel construction, making it the ultimate performance upgrade for 2019–2026 GM Silverado and Sierra 1500 trucks.